The tinned copper core double shielding layer makes the data transmission more stable. The cover layer of TPE material is soft and elastic, making the cable easy to use and easy to carry. It is also a spare cable or a good substitute. 4. [Universal Compatibility] Compatible with all Micro USB devices, such as Samsung, Xiaomi, oppo, vivo and other devices with Micro USB connectors (Note: The fast charging service requires a mobile phone with this function and is used with a 4A charger plug. Other models are compatible with 2A/3A current) 5. [Select different lengths] The length is 30cm, 1m, 2m, you can choose according to your needs, you can use it at home, office, car or travel. 6. [Bold telephone line]